Perizoma albulata
In 3 days ~10% in a week ~20%
Perizoma albulata, the grass rivulet, is a moth of the genus Perizoma in the family Geometridae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mercantour National Park | 🇫🇷 France | |
| 2 | Vanoise National Park | 🇫🇷 France | |
| 3 | Hohe Tauern National Park | 🇦🇹 Austria | |
| 4 | Pyrénées National Park | 🇫🇷 France | |
| 5 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Birmingham | 🇬🇧 United Kingdom | |
| 2 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Grass Rivulet sighting in London on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 1394th most-seen of the 1504 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Grass Rivulet in London on a given day, so our monthly data shows no clear season.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Grass Rivulet sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
2nd of 2
Of the 2 cities where we can rate Grass Rivulet sightings, London ranks 2nd at under 5%. The best odds are in Birmingham (United Kingdom, about 10%).
Same family: Geometridae
The closest relatives of the Grass Rivulet that you can see in London (family Geometridae, Geometer Moths) are Riband Wave (about 20%), Least Carpet (about 20%) and Double-Striped Pug (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Grass Rivulet is recorded against all the insects logged in London (6 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
